Home / 3,187.90-4,399.07-1,929.65

Finding the Fourth Proportional to 3,187.90, 4,399.07 and 1,929.65

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Solution

The fourth proportional to 3,187.90, 4,399.07 and 1,929.65 is: 2,662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.90 : 4,399.07 = 1,929.65 : x
  2. Step 2: Convert to fraction form
    3,187.90/4,399.07 = 1,929.65/x
  3. Step 3: Cross multiply
    3,187.90x = 4,399.07 × 1,929.65
  4. Step 4: Simplify right side
    3,187.90x = 8,488,666.77
  5. Step 5: Solve for x
    x = 8,488,666.77/3,187.90
  6. Step 6: Final answer
    x = 2,662.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.